microtest Chlorine 5

Dye Titration: In acid conditions, free chlorine is a very strong oxidant, and rapidly destroys organic azo dyes. Such an azo dye is used as a titrant and quantitatively destroyed while chlorine is present. The titration endpoint is indicated by an excess of dye causing a colour change from colourless to red.

Number of Tests

50 – 80

Interferences

Strongly alkaline water samples have to be neutralised before testing. Oxidants other than chlorine (e.g. bromine, ozone) will interfere. Only free chlorine can be determined.

Measuring Range

The recommended measuring range is 10 to 100 mg/L (2 – 20 drops @ 5 mg/L) for 5 mL of sample volume. This range can be extended by taking a smaller or larger water sample. For a 2.5 mL sample the measuring range is 20 to 200 mg/L and for a 10 mL sample the range is 5 to 50 mg/L.

Shelf Life

2 years

Applications

Determination and monitoring of chlorine levels as a disinfectant in food processing, in industrial water treatment (cooling towers).